- Error code
- K1-close
- Category
- Grid relay
- Manufacturer
- SMA
- Models
- Sunny Boy (SB)
1What the error means
Grid relay K1 did not close when commanded, so the inverter cannot connect to the grid.
2Possible causes
- Burnt or stuck relay K1
- Fault in the relay drive circuit
3What to do
- Restart once.
- If it returns, the relay needs to be replaced in our lab.
4Repair by Aineas
You send the inverter to our lab in Thessaloniki. We diagnose it, inform you of the fault and the cost, and the repair starts only after you approve it. Every inverter is tested under simulated operating conditions before delivery.